Waves Traveling disturbance that carries energy from one place to another. Do not carry matter! [http://www.catie.org.uk/facesofscience/images/waves_wavelength.jpg]

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Presentation transcript:

Waves Traveling disturbance that carries energy from one place to another. Do not carry matter! [http://www.catie.org.uk/facesofscience/images/waves_wavelength.jpg] Click here for a wave animation

Waves Medium – The matter that the wave travels through. This determines the speed of a wave!!!

Medium & Waves Mechanical Waves – these require a medium to travel through. Example: Sound Waves Click here for a mechanical wave video

Medium & Waves Electromagnetic Waves – do not need a medium to travel through. [http://www.nasa.gov/centers/langley/images/content/114284main_EM_Spectrum500.jpg]

Shapes of Waves Transverse Waves The medium moves at right angles to the direction of the wave. Transverse wave demo [http://library.thinkquest.org/15433/unit5/transv1.gif]

Shapes of Waves Crests or peaks (high points) and troughs (low points) are created. [http://imagers.gsfc.nasa.gov/ems/wave_crest.gif]

Shapes of Waves Compressional Waves The medium moves back and forth in the same direction as the wave. Also known as longitudinal. [http://ffden-2.phys.uaf.edu/211.fall2000.web.projects/p%20marvin%20and%20r%20gray/longwave.jpg]

Click here for compressional demo #1 Shapes of Waves These have compressions and rarefactions. Click here for compressional demo #1 Click here for compressional demo #2

Water Waves Surface moves up and down, but also slightly back and forth. Only move “matter” near shoreline! [http://www.seafriends.org.nz/oceano/ocean05.gif] Water wave demo